A barge with vertical sides is 10.0 m wide and 60.0 m long and is floating in fresh water. How much deeper into the water does the barge sink when 300,000 kg of coal are loaded on the barge?
A) 25.0 cm
B) 50.0 cm
C) 75.0 cm
D) 1.00 m
E) 1.50 m
B
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Though Titan has a small mass , it is able to retain an atmosphere because it
a. is very cold. b. is very hot c. has an iron surface. d. attracts gas from the solar wind.
How does the diameter of the disk of the Milky Way Galaxy compare to its thickness?
A) The diameter is about 100 times as great as the thickness. B) The diameter and thickness are roughly equal. C) The diameter is about 10 times as great as the thickness. D) The diameter is about 100,000 times as great as the thickness.
Two circular loops carry identical currents, but the radius of one loop is twice that of the other. How do the magnetic fields at the centers of the loops compare?
a) In both cases, the magnetic field at the center would be zero tesla. b) The magnetic field at the center of the larger loop is twice that at the center of the smaller loop. c) The magnetic field at the center of the larger loop is the same as that at the center of the smaller loop. d) The magnetic field at the center of the larger loop is one-half that at the center of the smaller loop. e) The magnetic field at the center of the larger loop is one-fourth that at the center of the smaller loop.
If the distance to the moon were halved, then the force of attraction between the earth and moon would be
A. quartered. B. halved. C. doubled. D. quadrupled.